java apps

I've read all the stickies from above and walked thru the process of putting games on my v505 phone. Very nice walk throughs. But the problem Im having is when trying to start the game it gives me an application error. I've read in a post that if you recieve this error the game is probably corrupted. Is this a fact or is there any other thing else I could try. I got the games from a members site here. The game is tony hawk and freeStyleX.